THE INHKIUTANCK OK THK MLZZI.I': COI.OL'U 



345 



to the distribution and the intensity of the pilonnent. I have not been 

 able to distinguish between these latter ones as the different shades 

 pass into each other. However, all spotted or slightly pigmented 

 muzzles are called mixed. In some cases it has been difficult to 

 decide if the muzzle is flesh coloured or slightly pigmented. The 

 fleshy colour is due to the absence of dark pigment, or to the presence 

 of a yellow pigment, apparently dominant to the dark pigment. 



Fig. 3. Cow No. 800. Mixed muzzle. 

 [Parents: çj No. 109 (P-muzzle), 

 9 No. 442 (A'-muzzle)]. 



The muzzle colour of 994 descendants together with their parents 

 have been listed. The result is put together in table I. 



Of the bulls used 55 were w^holly dark pigmented, 41 mixed, 

 and 29 flesh coloured. However, only 6 pigmented, 3 mixed, and 

 2 flesh coloured were used extensively, for it must be noted that the 

 rest of the bull? gave rise to only 61 out of 656, 51 out of 203, and 39 

 out of 135 descendants respectively. The inheritance of the muzzle 



